Functions and Parameters

The answer to the exercise in Functions and Parameters.

describeShow only declared one parameter, so the kind and the genres were passed and then dropped. A default fills in "show" when no kind is given. A rest parameter — which has to come last — collects the genres. Adding an array to a string joins its items with commas.

function describeShow(title, kind = "show", ...genres) { // was: (title)
  if (genres.length === 0) {
    return title + " (" + kind + ")";
  }
  return title + " (" + kind + "), " + genres; // new
}

console.log(describeShow("Severance"));
console.log(describeShow("Andor", "series", "Drama", "War"));